Very useful hints from all of you.
leaving Prague I changed the back tire -a Marathon Dureme, no deep profile- by a cheap MTB tyre, gruiipping better in snow. will not expense more for tyres as I cycle on roads alwayssnowplow, gravel sand or salt go around.
knees., that was a real danger
I kept cycling, reducing my daily distance to 30-50km, taking more days of break, caring about regularly drinking -water freezes in my bottles!! not pushing on the knees. My goal was to get to the Donau and avoid being stuck by heavy winter conditions in Czech Republik. Whether it is wise or not, I was conscious of the risks. Now that I am in Between Linz and Vienna, I am releaved: I can follow the Danube to the Black Sea. I Currently take rest at my hosts, working with them. using my hands more than my feet...
I wish you happy days for the end of the year - you know: merry new year and happy christmas-. From a family/community near the Danube, in Austria